Abstract
Abstract The results of a Fourier transform infrared spectroscopy (FTi.r.) study of the blend formed by poly(2,2′-m-phenylene)-5,5′-bibenzimidazole (PBI) and poly-[2,2-propane-bis(4-phenyl carbonate)] (PC) are discussed. The spectral features observed in the NH stretching and carbonyl stretching regions of all the compositions investigated have been interpreted in terms of hydrogen bonding interactions occurring between the NH groups of PBI and the CO groups of PC. Qualitative as well as quantitative information about these interactions has derived. The FTi.r. results indicate a high degree of molecular mixing between the two components at all blend compositions. A spectroscopic study as a function of temperature of a single blend composition ( 50 50 wt % ) is also reported. A quantitative analysis of the carbonyl region in the spectra yielded information about the onset temperature of large scale molecular mobility. A strong catalytic effect of PBI on the thermal degradation of PC was observed and is also discussed.
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